LONDON — South Korean archer Im Dong-hyun sees only blurred colors and lines when he peers toward the target about 76 yards away, arrow at the ready. It doesn’t stop the legally blind Olympian from hitting the grapefruit-sized yellow center — again and again and again.

Im set the first world record of the Olympics yesterday, breaking his own mark in the 72-arrow event. He broke the record he set in Turkey in May by three points with a score of 699, hours before the opening ceremony of the 2012 Games.

“This is just the first round, so I will not get too excited by it,” said Im, who has 10 percent vision in his left eye and 20 percent in his right.

He combined with Kim Bub-min and Oh Jin-hyek, breaking the record for 216 arrows with a score of 2,087.

The 26-year-old Im does not wear glasses in competition, saying he relies on distinguishing between the bright colors of the target.

GYMNASTICS: Despite the fact some believe the U.S. gymnastics team is a favorite, American McKayla Maroney said the team considers itself an underdog.

Maroney, the reigning world champion in the vault, said, “We really do believe in ourselves, but you always have to think of yourself as the underdog.’’

The 16-year-old Maroney, who aggravated a break in her right big toe last week, will compete in tomorrow’s qualifying event only on the vault.

“It’s weird, but it’s cool to know that I’m here for just that,’’ Maroney said.

TENNIS: Andy Murray, just three weeks removed from his heartbreaking Wimbledon loss to Roger Federer in the final, is trying to capture an Olympic gold medal as his consolation.

But he faces a daunting draw, beginning today with Stanislas Wawrinka in the first round.

Murray has won six of 10 meetings against Wawrinka, who’s ranked No. 26 in the world. In their only grass-court meeting, Murray beat him in a tough five-set match at Wimbledon in 2009.

Interestingly, Murray has been practicing with Wawrinka for about a week, so, as Murray’s coach, Paul Hutchins said, “They will certainly know each other well.’’

If Murray wins, there are several other potential pitfalls ahead for him, including Frenchman Richard Gasquet, who Murray beat in an epic five-set final in 2008 at Wimbledon. They could meet in the third round. Tomas Berdych, a Czech ranked 21st in the world, is a potential quarterfinal opponent. He’s beaten Murray in four of their last six meetings, including Monte Carlo

FENCING: U.S. fencer Mariel Zagunis was the American flag bearer in last night’s opening ceremony. She was nominated by fellow American fencer Tim Morehouse from Manhattan and voted in by her peers.

Zagunis, 27, was a late addition to the U.S. fencing team in 2004 and won the gold medal in sabre to become the first U.S. fencer to win a gold medal in 100 years. She repeated as gold medalist in the event in 2008.

“It is such a great honor to not only represent the U.S. but to do it in the first Olympics that have more women than men competing and on the 40th anniversary of Title IX is amazing,’’ she said. “I’m also the third fencer since 1908 to have this opportunity. This is the cherry on top of a pile of cherries already there in my Olympic experiences.’’